whakamahere mati PDC mō te tūranga pūhuringa, kaupapa pūhuringa
Nā ngā pūtētē PDC (Polycrystalline Diamond Compact) te whakamahere hou me te mōhiotanga nui i roto i te tāngata o te hanganga pūnaha rīpeka. Ko ēnei rautaki matatika e whai ana i ngā kara kīreia e tūhono noa atu ki ngā pū karu tungsten, whakatupuria ai he wāhi tokoiti nui rawa atu me te pai ake. Kua hangaia ngā pūtētē PDC hei whakangungu mai i ēnei whenua rite tonu, me te mau here tinana me te hopu wā. Kei te hanga i ēnei pūtētē ko ngā momo tokoiti iti e takoto ana i runga i te kanohi pū, whakaaeke ana i te whakapakoko whenua pai rawa me te whakapai i te mahi hanga. E mahi ana ngā pū nei i te mahi tokoiti, kaore i te pūtake reretahi ka whakapakoko i ngā whenua. Ko te hanga huarere mōkoki e whai ana i te pai i te tahutahu whenua me te tirotiro pai i te waehu pū i te mahi. Nō reira, kua nui ake te pupuri i aua pū i roto i te rōpū pūnaha rīpeka, nā te kitea i te āheinga pai o te whakatōpuke i runga i te wā e hirari ana, e whakanui ana i te tirotiro i te hokohoko o ngā pū me te iti iho i te wā kawe moni. Kei te whai take tonu te hanga me te whakapai o ngā pūtētē PDC, ā, kei te whakauru huarahi hou me ngā whakaaturanga hanga hei whakapai i te whanake me te mahi i waenganui i ngā whenua rerekē.